
Constructors pose for a group photo in a subway of Shijiazhuang, north China's Hebei Province, June 14, 2017. Shijiazhuang started running its first subway lines on Wednesday. (Xinhua/Zhan Xincheng)

Constructors pose for a group photo in a subway of Shijiazhuang, north China's Hebei Province, June 14, 2017. Shijiazhuang started running its first subway lines on Wednesday. (Xinhua/Zhan Xincheng)